- Rounded 9-blade diaphragm
- Built-in petal-shaped lens hood
- Two fld elements and five sld elements
- Incorporates both "f" low dispersion (fld) glass & 5 special low dispersion (sld) glass
- Compatible with sony's continuous af (af-c) and high-speed autofocus
Sony E Mount Aperture Range: f/1.4 to f/16 Two FLD Elements and Five SLD Elements Two Aspherical Elements Super Multi-Layer Coating Hyper Sonic AF Motor, Manual Override Rounded 9-Blade Diaphragm TSC Material, Brass Bayonet Mount Built-In Petal-Shaped Lens Hood Compatible with Sigma USB Dock